add hg and python

sys/lib/python/mercurial/ignore.py

@@ -0,0 +1,103 @@
+# ignore.py - ignored file handling for mercurial
+#
+# Copyright 2007 Matt Mackall <mpm@selenic.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+from i18n import _
+import util, match
+import re
+
+_commentre = None
+
+def ignorepats(lines):
+    '''parse lines (iterable) of .hgignore text, returning a tuple of
+    (patterns, parse errors). These patterns should be given to compile()
+    to be validated and converted into a match function.'''
+    syntaxes = {'re': 'relre:', 'regexp': 'relre:', 'glob': 'relglob:'}
+    syntax = 'relre:'
+    patterns = []
+    warnings = []
+
+    for line in lines:
+        if "#" in line:
+            global _commentre
+            if not _commentre:
+                _commentre = re.compile(r'((^|[^\\])(\\\\)*)#.*')
+            # remove comments prefixed by an even number of escapes
+            line = _commentre.sub(r'\1', line)
+            # fixup properly escaped comments that survived the above
+            line = line.replace("\\#", "#")
+        line = line.rstrip()
+        if not line:
+            continue
+
+        if line.startswith('syntax:'):
+            s = line[7:].strip()
+            try:
+                syntax = syntaxes[s]
+            except KeyError:
+                warnings.append(_("ignoring invalid syntax '%s'") % s)
+            continue
+        pat = syntax + line
+        for s, rels in syntaxes.iteritems():
+            if line.startswith(rels):
+                pat = line
+                break
+            elif line.startswith(s+':'):
+                pat = rels + line[len(s)+1:]
+                break
+        patterns.append(pat)
+
+    return patterns, warnings
+
+def ignore(root, files, warn):
+    '''return matcher covering patterns in 'files'.
+
+    the files parsed for patterns include:
+    .hgignore in the repository root
+    any additional files specified in the [ui] section of ~/.hgrc
+
+    trailing white space is dropped.
+    the escape character is backslash.
+    comments start with #.
+    empty lines are skipped.
+
+    lines can be of the following formats:
+
+    syntax: regexp # defaults following lines to non-rooted regexps
+    syntax: glob   # defaults following lines to non-rooted globs
+    re:pattern     # non-rooted regular expression
+    glob:pattern   # non-rooted glob
+    pattern        # pattern of the current default type'''
+
+    pats = {}
+    for f in files:
+        try:
+            pats[f] = []
+            fp = open(f)
+            pats[f], warnings = ignorepats(fp)
+            for warning in warnings:
+                warn("%s: %s\n" % (f, warning))
+        except IOError, inst:
+            if f != files[0]:
+                warn(_("skipping unreadable ignore file '%s': %s\n") %
+                     (f, inst.strerror))
+
+    allpats = []
+    [allpats.extend(patlist) for patlist in pats.values()]
+    if not allpats:
+        return util.never
+
+    try:
+        ignorefunc = match.match(root, '', [], allpats)
+    except util.Abort:
+        # Re-raise an exception where the src is the right file
+        for f, patlist in pats.iteritems():
+            try:
+                match.match(root, '', [], patlist)
+            except util.Abort, inst:
+                raise util.Abort('%s: %s' % (f, inst[0]))
+
+    return ignorefunc